When something is completely quantum un-entangled from the world around it.
"My physics professor speculates that ghosts exist in quantum dissipation mode most of the time. However, he says that if their quarklets manage to get entangled again, they then become visible to us. It must be really cool to be a Prof and think crazy thoughts, but get paid for it."
Quan at maximum freak mode. When Quan lowers his head and makes a slightly disturbing grin you can tell he has entered the quantum mode. (Quan is most known for drugging people with sex chocolate then raping the whole town while in quantum mode) if you don’t want the effects of the quantum mode he won’t get turned on if you are at least 69 feet away.
I gave quan a handshake and then he looked like an absolute frickin lunatic shaking my hand at a rapid pace, I think he entered the quantum mode.